<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>旋转数组</title>
</head>

<body>
  <script>
    let arr = [1, 2, 3, 4, 5, 6, 7, 8, 9]
    let k = 1
    for (let i = 0; i < k; i++) {
      arr.unshift(arr.pop())//移除最后的元素 添加开始位置

    }
    console.log(arr);
  </script>
</body>

</html>